Briggs & Stratton
Lawn & Garden Engine

Model # 11P902-0129-B3 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 11P902-0129-B3 engine, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 131 parts  |

Lawn & Garden Equipment Engine Fuel Tank Cap (replaces 397974, 494277, 692041, 692046, 699985, 793606, Bs-692046, Bs-796577) 796577

#957

All parts diagram

Lawn & garden equipment engine fuel tank cap (replaces 397974, 494277, 692041, 692046, 699985, 793606, bs-692046, bs-796577)

Part #796577

BEST SELLER
$20.69
22% OFF Phone Price : $26.69
In Stock
Lawn & Garden Equipment Engine Spark Plug 692051

#337

All parts diagram

Lawn & garden equipment engine spark plug

Part #692051

BEST SELLER
$8.59
10% OFF Phone Price : $9.59
In Stock
Grip-starter Rope 795426

#60

All parts diagram

Grip-starter rope

Part #795426

Replaced by #281434S

?
Manufacturer substitution
This part replaces 795426. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$6.34
14% OFF Phone Price : $7.34
In Stock
Lawn & Garden Equipment Engine Air Filter (replaces Bs-797301) 797301

#535

All parts diagram

Lawn & garden equipment engine air filter (replaces bs-797301)

Part #797301

$9.69
9% OFF Phone Price : $10.69
In Stock
Lawn & Garden Equipment Engine Air Filter Collar Gasket (replaces 273364, Bs-691894) 691894

#163

All parts diagram

Lawn & garden equipment engine air filter collar gasket (replaces 273364, bs-691894)

Part #691894

This item is not returnable
$6.89
13% OFF Phone Price : $7.89
In Stock
Lawn & Garden Equipment Engine Spark Plug Wire Terminal (replaces 493880, 691234, Bs-493880s) 493880S

#851

All parts diagram

Lawn & garden equipment engine spark plug wire terminal (replaces 493880, 691234, bs-493880s)

Part #493880S

This item is not returnable
$4.75
17% OFF Phone Price : $5.75
In Stock
Lawn & Garden Equipment Engine Crankshaft Oil Seal (replaces 399781, 691989, Bs-399781s) 399781S

#20

All parts diagram

Lawn & garden equipment engine crankshaft oil seal (replaces 399781, 691989, bs-399781s)

Part #399781S

This item is not returnable
$11.11
15% OFF Phone Price : $13.11
In Stock
Lawn & Garden Equipment Engine Intake Gasket 796596

#51

All parts diagram

Lawn & garden equipment engine intake gasket

Part #796596

This item is not returnable
In Stock
Lawn & Garden Equipment Engine Oil Drain Plug (replaces 94720, 94880, Bs-691680) 691680

#15

All parts diagram

Lawn & garden equipment engine oil drain plug (replaces 94720, 94880, bs-691680)

Part #691680

$9.59
9% OFF Phone Price : $10.59
In Stock
Lawn & Garden Equipment Engine Dipstick Tube O-ring, Upper 691031

#842

All parts diagram

Lawn & garden equipment engine dipstick tube o-ring, upper

Part #691031

This item is not returnable
$7.59
12% OFF Phone Price : $8.59
In Stock

Symptoms for gas chainsaws

Choose a symptom to see related chainsaw repairs.

Main causes: stale gasoline, cracked fuel lines, dirty carburetor, damaged spark plug, worn piston rings…

Main causes: bad gas, engine needs tune up, cracked fuel lines, dirty carburetor…

Main causes: cracked fuel lines, leaky carburetor seals, damaged fuel tank cap, cracked fuel tank…

Repair guides for gas chainsaws

These step-by-step repair guides will help you safely fix what’s broken on your chainsaw.

How to rebuild a chainsaw carburetor

How to rebuild a chainsaw carburetor

If your chainsaw isn't running well, a dirty carburetor could be the problem. You can take it apart, clean it and rebuil…

Repair difficulty
Time required
 15 minutes or less
How to replace chainsaw fuel lines

How to replace chainsaw fuel lines

The fuel line on a chainsaw becomes brittle over time and can crack. Replacing it doesn't require a lot of DYI experienc…

Repair difficulty
Time required
 15 minutes or less
How to replace a chainsaw carburetor

How to replace a chainsaw carburetor

If the engine won't start even though there's fuel in the chainsaw, the carburetor could be the problem. Sometimes, it's…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your lawn & garden engines

Use the advice and tips in these articles and videos to get the most out of your chainsaw.

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…